CodeASystem calculators

Dates & Time calculators

Dates & Time5

Date and time calculators for ages, days between dates, deadlines, business days and time durations.

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5 tools

Work out an exact age in years, months and days from a date of birth, plus total days and weeks lived, using precise calendar arithmetic.

Count the total days between two calendar dates, with a weeks-and-days breakdown and an optional inclusive count of both endpoints.

Add or subtract days, weeks, months or years from any date and get the resulting calendar date in clean ISO format.

Count business days between two dates, excluding Saturdays and Sundays and subtracting any holidays you specify.

Measure the elapsed time between two clock times on the same day, shown as H:MM:SS plus decimal hours for timesheets.